Forward rapidity isolated photon production in proton-nucleus collisions
| Autor: | Tuomas Lappi, B. Ducloué, Heikki Mäntysaari |
|---|---|
| Přispěvatelé: | Institut de Physique Théorique - UMR CNRS 3681 (IPHT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), ANR-16-CE31-0019,DenseQCDatLHC,Etude du régime de haute densité partonique de QCD dans les collisions hadroniques au LHC(2016), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Helsinki Institute of Physics |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Drell-Yan process
Photon geometry Proton Nuclear Theory pi: production hiukkasfysiikka 01 natural sciences Color-glass condensate High Energy Physics - Phenomenology (hep-ph) coupling constant: energy dependence optical Nuclear Experiment Brookhaven RHIC Coll Physics photon: production energy: high higher-order: 0 higher-order: 1 suppression Balitsky-Kovchegov equation High Energy Physics - Phenomenology CERN LHC Coll kinematics Nuclear and High Energy Physics Meson [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] FOS: Physical sciences Glauber meson 114 Physical sciences dilepton Nuclear physics Nuclear Theory (nucl-th) Pion deep inelastic scattering 0103 physical sciences Rapidity proton-nucleus collisions 010306 general physics ta114 010308 nuclear & particles physics nucleus photon production Deep inelastic scattering boundary condition Automatic Keywords rapidity [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] color glass condensate cross section: dipole p nucleus |
| Zdroj: | Nucl.Phys.A 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, May 2018, Venice, Italy. pp.267-270, ⟨10.1016/j.nuclphysa.2018.10.064⟩ Nuclear Physics A |
| DOI: | 10.1016/j.nuclphysa.2018.10.064⟩ |
| Popis: | We calculate isolated photon production at forward rapidities in proton-nucleus collisions in the Color Glass Condensate framework. Our calculation uses dipole cross sections solved from the running coupling Balitsky-Kovchegov equation with an initial condition fit to deep inelastic scattering data and extended to nuclei with an optical Glauber procedure that introduces no additional parameters beyond the basic nuclear geometry. We present predictions for future forward RHIC and LHC measurements. The predictions are also compared to updated results for the nuclear modification factors for pion production, Drell-Yan dileptons and $J/\psi$ mesons in the same forward kinematics, consistently calculated in the same theoretical framework. We find that leading order, running coupling high energy evolution in the CGC picture leads to a significant nuclear suppression at forward rapidities. This nuclear suppression is stronger for photons than for pions. We also discuss how this might change with next-to-leading order high energy evolution. Comment: 4 pages, 4 figures, talk by T.L. at the Quark Matter 2018 conference |
| Databáze: | OpenAIRE |
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